Combination dressing and grinding wheel



Oct. 27, 1931. R. P. PLACE COMBINATION DRESSING AND GRINDING WHEEL Filed July 2, 192a -fi /d/70 /ace.

, attozwaq Patented Oct. 2 7, 19 31 1.

UNITED STATES PATENT OFFICE) ROLAND RPLAGE, OF MIDLAND, MICHIGAN, ASSIGNOR TO ROLAND P.'PLACE.CO., OF

- MIDLAND, MICHIGAN, A CORPORATION OF MICHIGAN COMBINATION DRESSING AND GRINDING WHEEL Application filed July 2, 1928. Serial No. 289,773.

This invention relates to cutting and abrading wheels and the like, and particularly to a combination tool for dressing a grinding wheel as it is rotated. v

The prime object of the invention is to design a combination cutting and abrading tool so constructed as to dress the wheel that grinds the work, and in which the hardness and area of the cutting element regulates the grinding action. 7

Another object is to provide a simple, substantial, and inexpensive dressingtool, which is of simple construction, and in which the,

abrasive material is tightly held.

A further object is to provide a combination dressing tool, which will eliminate one dressing operation, which will wear evenly, and which can be formed of any desired density or hardness.

The above and other objects will appear as the specification progresses, reference being had to the accompanying drawings in which I have shown the preferred embodimentof my invention, and in which like reference numerals indicate like parts throughout the sev eral views thereof. I

In the drawings: Fig. 1 is a section of my combination dressing and abrading wheel taken on the line 11 of Fig. 2.

Fig. 2 is a vertical transverse view taken on the line 22 of Fig. 1.

Fig. 3 is a side view of the tool. Fig. 4- is an edge view of the nut and locking washer.

Fig. 5 is an end view thereof. I-Ieretofore when a grinding wheel becomes unfit for accurate service it has been custoe mary to first dress said wheel by means of a tool provided with a plurality of hardened toothed cutters which are rotated by contact therewith, an abrading tool being then used to finish and smooth to proper size and smoothness. and separate operations, and Ihave therefore perfected a combination tool which si- .multaneously dresses and grinds the wheel,

the dressing action being governed by the hardness and spacing of the dressing cutters and the density of the abrading material.

This necessitated two distinct Referring now to the drawings in which I have shown the preferred embodiment of my invention, the numeral 5 indicates a preferably hood shaped case in which the cutting and abrading element is rotatably mounted,

a handle 6 being secured thereto, or can be formed integral therewith if desired. Hubs 7 and 8 respectively are formed on opposite sides of the case, and are split as shown at 9 to permit the entire cutting and abrading element to be removed as a unit, all as shown and described in my application for Letters Pat-;

ent for dressing tools filed July 1, 1927, Serial No. 202,911 and I- shall not describe the specific mounting of the unit in detail, as it comprises no part of the present invention, which is directed to the combination and construcshown) which are adapted to be engaged by corresponding fiat surfaces formed on the base of the disk. A washer 18 of predetermined thickness is neXt fitted on the turned surface, and a cutter 19 fits thereagainst, a

-washer and cutter being placed alternately teeth 20 so that when assembled, the teeth of the adjacent cutters will alternate.

One end of the barrel is threaded as shown at 21, and a nut 22 is threaded thereon and serves'to clamp the unit tightly in position.

The next step is the application of the abrasive material, this may be carborundum or a similar material, and is tightly wedged and packed in the interstices between the cutters until said interstices are completely filled, andthe face of the abrasive material is flush with the face of the cutter teeth, these cit cutters are of course hardened, and the body of the disk can be provided with small openings or laterally projecting wings to form a firm anchorage for the abrasive material. The area of the abrasive material is of course deteri'nined by the thickness of the washers, and these can be made up in various thicknesses to suit the requirements.

I wish to direct particular attention to the fact that the outer periphery of the end disks 1? and 1'! are smooth and are not provided with teeth, eliminating possibility of chipping or crumbling the abrasive material in the tool. The tool cuts as it grinds, so that when the dressing is finished the grinding is also complete, the grinding speed being regulated by the number of the cutter teeth which must wear evenly with the abrasive material.

From the foregoing description it will be obvious that l hare perfected very simple,

economical, and effective combination cutting and grinding tool.

l Vhat I claim is 1. A combination dressing and grinding tool comprising a plurality of spaced apart,

hardened cutter disks, and an abrading material filling the interstices between said cutter disks.

2. A combination dressing and grinding tool comprising a core adapted to be mounted on a shaft and having a plurality of spaced apart cutter members mounted thereon, and

an abrading material filling the interstices be-' tween said members and flush with the outer periphery thereof.

8. A combination dressing and grinding tool comprising a core having a plurality of spaced apart toothed cutter members, and an abrading material interposed between said cutter members and flush with the teeth of said cutters.

i. A combination dressing and grinding tool comprising a core having a plurality of spaced apart toothed cutter members mounted thereon, and an abrading material between said members and flush with the teeth thereof. and means for clamping said cutters on the core.

5. A combination dressing and grinding tool comprising a core having a plurality of spaced apart toothed cutter members mounted thereon to form a unit, disks on the ends of the cutter unit, and an abrading material interposed between said cutter members and forming a cylinder therewith.

6. A combination dressing and grinding tool comprising a core, a plurality of spaced apart toothed cutter elements mounted thereon and forming a unit, smooth faced disks at the ends of the unit, and an abrading material between said elements and forming a smooth cylinder therewith.

In testimony whereof I hereunto afiix my signature.

ROLAND I. PLACE. 

